/*
 * Copyright (c) 2009, The MilkyTracker Team.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - Neither the name of the <ORGANIZATION> nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 *  AudioDriverBase.cpp
 *  MilkyPlay
 *
 *  Created by Peter Barth on 15.12.07.
 *
 */

#include "AudioDriverBase.h"
#include "MasterMixer.h"

#if defined (__PSP__)
    #include <pspkernel.h>
#elif !defined (WIN32) && !defined (_WIN32_WCE)
    #include <unistd.h>
#else
    #include <windows.h>
#endif

void AudioDriverBase::msleep(mp_uint32 msecs)
{
    #ifdef WIN32
    ::Sleep(msecs);
    #elif defined (__PSP__)
    sceKernelDelayThreadCB(msecs * 1000);
    #elif defined (__AROS__)
    // usleep is not implemented on AROS
    if (msecs < 1000) msecs = 1000;
    sleep(msecs / 1000);
    #else
    usleep(msecs * 1000);
    #endif
}

bool AudioDriverBase::isMixerActive()
{
    if (idle)
        return false;

    if (markedAsIdle)
    {
        markedAsIdle = false;
        idle = true;
        return false;
    }

    return (mixer && mixer->isPlaying());
}

void AudioDriverBase::setIdle(bool idle)
{
    if (mixer == 0)
        return;

    if (idle)
    {
        if (markedAsIdle || this->idle)
            return;

        markedAsIdle = true;

        // this is going to loop infinitely when the audio device is not running
        double waitMillis = ((double)(bufferSize / 2) / (double)mixFrequency) * 1000.0 * 2.0;
        if (waitMillis < 1.0)
            waitMillis = 1.0;
        if (waitMillis > 5000.0)
            waitMillis = 5000.0;

        mp_uint32 time = 0;
        const mp_uint32 sleepTime = 10;
        while (!this->idle && time <= (mp_uint32)waitMillis)
        {
            msleep(sleepTime);
            time += sleepTime;
        }
        if (!this->idle)
            this->idle = true;
    }
    else
    {
        this->idle = false;
        this->markedAsIdle = false;
    }
}